5.3 Ignition settings 5 SETTING UP A BASIC CONFIGURATION
5.3.15 Twin trigger
Twin trigger is a specific ignition mode designed for use on a range of motorcycle engines that use a crank or cam
mounted reluctor and two discrete pickup sensors. Each sensor triggers a separate ignition coil.
Supported combinations include:
• Crank wheel. 4 cylinder, 4 stroke engines with wasted spark ignition, non sequential fuel.
• Crank wheel. 2 cylinder, 4 stroke engines with in wasted spark ignition, non sequential fuel.
• Cam wheel. 2 cylinder, 4 stroke engines with in coil-on-plug ignition, non sequential fuel.
This mode can be used on both even fire and odd fire engines.
5.3.16 Chrysler 2.2 / 2.5
This setup is unique to Chrysler 2.2 and 2.5 engines from the 1980s and early 1990s, equipped with multiport
injection. (The TBI versions of this engine used Basic Trigger mode instead.) It uses a four tooth cam trigger with
a “window” in the middle of one tooth, Hall effect sensors which require pull up resistors, and both sensors read
the same trigger wheel, but from different angles. Currently this mode is experimental. With current firmware, only
the primary Hall effect sensor is used, wired to CKP+.
5.3.17 Renix 44-2-2
Known applications include:
• 1987-1990 Jeep Cherokee 4.0
• Many 1980s era Renault products
This trigger mode came in a four cylinder variation which used 44 base teeth with two gaps 180 degrees apart, and
a six cylinder version with 66 base teeth and three gaps 120 degrees apart. A cam signal is needed for sequential
injection. Jeeps had a cam sensor from the factory, while most Renaults did not.
5.3.18 Suzuki Swift
This mode is considered experimental. It works for Suzuki Swift engines with a distributor with a VR sensor and
12 irregularly spaced teeth. This mode does not support sequential injection, and can only be used with a single
coil. Because of the nature of the VR sensor, it can trigger off either edge, depending on the wiring. Ignition input
capture should be tried both ways and set to which one gives you the most stable signal.
AMP EFI MS3Pro manual version 1.202, firmware 1.5.0, 4/21/2017 Page 91
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